Superman / Batman vs. Vampires and Werewolves #6
an issue of Superman / Batman vs. Vampires and Werewolves by DC Comics
Issue description
Destroy all monsters! The Man of Steel and the Dark Knight Detective - with help from their own supernatural expert Etrigan, the Demon - battle Dr. Combs and his vampire and werewolf horde for the fate of all of Gotham City. But when the good doctor invokes a Lovecraftian beast to join the fight, it will be the ultimate monster mash for Superman and Batman!